Hydraulic control system with cross function regeneration

Details Hydraulic control system with cross function regeneration Hydraulic control system with cross function regeneration

2005-03-14

2008-11-18

Nguyen, Hoang M (Department: 3748)

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

C091S420000, C091S421000, C091S435000

Reexamination Certificate

active

07451685

ABSTRACT:
A system operates a hydraulic actuator, such as a cylinder, in one of several modes that include powered extension and retraction, self-powering regeneration modes in which fluid exhausting from one cylinder chamber is routed into the other cylinder chamber, and cross function regeneration modes wherein the fluid exhausted from one actuator is routed in the supply conduit to power a different actuator. A controller determines which modes are viable based on existing system conditions and selects from among the viable available modes. That determination is a function of the desired velocity for the actuator, the hydraulic load on the actuator, and pressures in the supply and return hydraulic conduits. The system also can recover potential or kinetic energy through pressure intensification which recovered energy can be used to power another simultaneously active hydraulic function or to drive the prime mover via an over-center variable pump/motor.

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